Question

What is the structure of Present Perfect Continuos Tense?

Answer 1

Present - have
perfect - been
continuous -- verb+ing
structure : have / has + been + verb + ing
example
i have been waiting for you for two hours.

Answer 2

subject + auxiliary verb + auxiliary verb + main verb 
                   have              been              base + ing
                   has

ex-- i(subject) + have(auxiliary verb) + been(auxiliary verb) + talking(base+ing) + too much.
    
                    hope it helps. pls mark it as best ans if u like it.